Spring-wheel.



Patented .11ug.6,1912.

' Atomeyg.

G. SJGREN.

, SPRING WHEEL.

APPLICATION FILED 11211.10. 1912.

cnam; saa-ann, or fwnssiiv'e'roiv srniues, sourir minerai SPRING-WHEEL.

annessa.

To zi'wwirim it may concern:

Be itjknovvn that I, CHARL SJennN, a citizen ofthe United States, residing at lliessington Springs, in the county of Lderauld and State of South Dakota, have invented a new and useful Spring-iVheel, 'of Which'the following is a specification. A

The @device herein disclosed is adapted to be yeni'ployed upon vehicles, for the purpose and with Y'this end in view, one object of the invention fic is to provide a tire. which is composed of helical springs, the end of one spring being,` inserted intothe end of an adjoining spring in telescoping relation, thus to resist relative .lateral movement between the springs and to enhance the resiliency of the tire.

A further object of the invention is to provide as an article of manufacture. a coinbiiied tire-forming and spoke-forming' element which may be fashioned at triliing cost, to alford the desired resiliency both in the tire and in the spoke.

1Vlfith the foregoing and other objects in view, which Will appear as the description proceeds, the invention resides in the coinbinatibn and arrangement of parts and in tbe'details of construction hereinafter de scribed and claimed, it being,l undestood that Changes 'in the precise embodiment of invention herein disclosed can be inade Within tite scope of what is claimed Withoutdeparting' from the spirit of the invention.

ln the accoini'ianying driviwingise-Figure l is e; sectional side elevation of a portion 'of -a Wheel constructed in accordance with the present invention; Fig. 2 is a radial section upon the line iii-B of Fig. l; Fig. 3 is'a side elevation of one of the combined tire and spoke-forming elements; and Fig.

' 4 "is a fragmental section showing a. modified forni of invention.

Tn the accompanying drawings, therigid vpetition of a Wheel is shown, and it is to be understood that the rigid portion of the Wheel may be fashioned in any desired inan viler. F or thesake of illustration, the rig-id portion'of the Wheel is shown as comprising ahub l from which projects aspoke plate 2 provided with laterali;7 extended ribs 3 having' radial sockets l.' There are openings 5 in the ribs 3 and the socket-s 4 communicate with the openings 5.

The invention further include-a a helical spring 6, the convolutions of :mien are di' minished in diameter adjacent lone end of Patented Aiigf; 1912. message. I' N the spring to forni an extensionp.. TheA final convolution at thelargerend of thespring G is fashioned Vintoza spokeeforininghelical spring 8. Those convolutions of tliefspring 8 which are adjacentthespriiig are close together and preferably'vin' Contact.fas'findicated at 9. Owing to the," fact thatI they convolutionst are incont-act, therportion 9 of the spring-8 is adapted to resist expansion, vieldingly Thoseconvclutions of thespring 8 which arel adjacentv to 'the free lextremity of the spring arejspaced l/apait slightly as indicated at '10. .The fconvolutionsil() are adapted to resist compression, yielding'ly. The nal convolution of the portion l of the spring 8 terminates in a finger l1 which is threaded as indicated at 12. The eXtension f Within the body portion 6 to the next ad- 'joining spring. the relative diameters ofthe convolutions 6 and 7 being such that the spring about its periphery will present an unbroken tread surface. The spoke-forming springs 8 seat in the sockets 4l, the spring fingers ll passingthrough the shoulders lit in the ribs 3 Which lie between the opening 5 and the hub l. Nuts 'are applied to the threaded ends l2 of the spring' 8 and engage the inner and outer faces of the shoulder 14.

lt inav be seen that the spring): element ji'oved readily from the Wheel and wither; at facility be replaced by another similar element. The device. as shoivn in Fig. 3, comprises in "a one-piece structure. a l tire-forming helical spring' and a radially disposed spokeforming helical spring vadapted for. connection with the hub portion of the Wheel.

The spring 6, its extension 7, the spring' 8 and the finger l1 are fashioned from a single bar of material. The bar is so shaped that the convolutions of the resilient elements G and lTivill'loe slightly Wider adiacent the tread portion of the tire' than ad- Iiacent the inner circumference thereof, so thatlhere will be no spaces'betiveen the convolut-ions of the respective elements 6 and 7. That portion of the rod or bar Which enters into the consti-notion of the spring 8 is of a common .diameter it being desirable that the spring 8 shall be in the form of a cylinde-r the axis ot' which is straight froin end to end.

If desired, the device may be fashioned from a bar of fiat metal, and under such circumstances the convolutions of the porof one spring' is adapted to lit closely .1,5` at one end than-at the other end; and a tions 6 and 7 will appear as shown at 16 in' Fig. 4, each convolution 16 being recessed along one edge as shown at 17 to form a shoulder against which' the edge of the next adjacent convolution is adapted to abut.

Having thus described the invention, Whatis claimed is 1. As an article of manufacture, a tireforming helical spring of greater diameter at -one end than atthe other end; and a spoke-forming helical spring. projecting from the larger end of the tire-forming spring.

2. Aslan article of manufacture, a tireforming helical spring of greater diameter spoke-forming helical spring, projecting from the larger end of the ltire-forming spring, the' spoke-forming spring having certain of its convolutions in contact to resist eXpansion, and having others of its con` volutions spaced apart to resist compression.

3. As an article of manufacture, a tireat. one end than at the other end; and a spoke-forming helical spring projecting from' the larger end lof the tire-forming spring; the lines of contact between adjacent convolutions of the tire-forming spring converging toward a common point,

and the adjacent edges of the convolutions' of 'the spoke-forming spring being parallel. 'In testimony that l claim the foregoing as my own, .I have hereto aiiixed my signature in the presence of two witnesses.

` CHARL SJGREN.

Witnesses:

CHAs. R. HATCH, CHAs. W. MILLER. 

